Jiang Zhujiu ("Jujo") is a Chinese 9-dan professional who currently plays in Korea. (In Korean his name is Chang Chu-chu, also spelt Kang Jugu.)
Jiang won the first North American Masters Tournament in 1995, being eligible as he had by then been living in the United States for several years. He has successfully defended the title every year since.
Jiang is married to Rui Naiwei. His brother Jiang Mingjiu is also a professional go player.
Jiang has been seen playing on the Internet Go Server from time to time.